WIKA DI25 User manual

DIGITAL INDICATOR
DI25
Operating instructions

2
Preface
Thank you for purchasing our digital indicator DI25. This manual contains instructions for the mounting,
functions, operations and notes when operating the DI25. To prevent accidents arising from the misuse of this
instrument, please ensure the operator receives this manual.
Notes
•This instrument should be used in accordance with the specifications described in the manual.
•If it is not used according to the specifications, it may malfunction or cause a fire.
•Be sure to follow the warnings, cautions and notices. If they are not observed, serious injury or malfunction may
occur.
•The contents of this instruction manual are subject to change without notice.
•Care has been taken to ensure that the contents of this instruction manual are correct, but if there are any doubts,
mistakes or questions, please inform our sales department.
•Measures must be taken to ensure that the operator cannot touch power terminals or other high voltage sections.
•Any unauthorized transfer or copying of this document, in part or in whole, is prohibited.
•WIKA is not liable for any damage or secondary damage(s) incurred as a result of using this product, including
any indirect damage.
Safety precautions (Be sure to read these precautions before using our products.)
The safety precautions are classified into categories: “Warning” and “Caution”. Depending on circumstances,
procedures indicated by Caution may result in serious consequences, so be sure to follow the directions
for usage.
Warning
Caution
Warning
•To prevent an electrical shock or fire, only WIKA or other qualified service personnel may handle the inner
assembly.
•To prevent an electrical shock, fire or damage to the instrument, parts replacement may only be undertaken
by WIKA or other qualified service personnel.
•This is an equipment of the emission class A that is intended for operation in industrial environment. It can
cause interference under certain circumstances if operated in other environment e.g. residential or
commercial area. In this case the user can be asked to take appropriate measures.
Safety precautions
•To ensuresafe andcorrectuse,thoroughlyreadandunderstand thismanual beforeusingthisinstrument.
•This instrument is intended to be used for industrial machinery, machine tools and measuring equipment.
Verify correct usage after purpose-of-use consultation with a WIKA service engineer. (Never use this
instrument for medical purposes with which human lives are involved.)
•External protection devices such as protective equipment against excessive temperature rise, etc. must be
installed, as malfunction of this product could result in serious damage to the system or injury to personnel.
Proper periodic maintenance is also required.
•This instrument must be used under the conditions and environment described in this manual. WIKA does
not accept liability for any injury, loss of life or damage occurring due to the instrument being used under
conditions not otherwise stated in this manual.
Procedures which may lead to dangerous conditions and cause death or serious
injury, if not carried out properly.
Procedures which may lead to dangerous conditions and cause superficial to
medium injury or physical damage or may degrade or damage the product, if not
carried out properly.

3
Caution with respect to export trade control ordinance
To avoid this instrument from being used as a component in, or as being utilized in the manufacture of weapons of
mass destruction (i.e. military applications, military equipment, etc.), please investigate the end users and the final
use of this instrument. In the case of resale, ensure that this instrument is not illegally exported.
1. Installation precautions
Caution
This instrument is intended to be used under the following environmental conditions (IEC61010-1):
Overvoltage category , Pollution degree 2
Ensure the mounting location corresponds to the following conditions:
•A minimum of dust, and an absence of corrosive gases
•No flammable, explosive gases
•No mechanical vibrations or shocks
•No exposure to direct sunlight, an ambient temperature of 0 to 50 °C (32 to 122 °F) that does not change
rapidly, and no icing
•An ambient non-condensing humidity of 35 to 85 % RH
•No large capacity electromagnetic switches or cables through which large current is flowing
•No water, oil or chemicals or where the vapors of these substances can come into direct contact with the unit
•Please note that the ambient temperature of this unit – not the ambient temperature of the control panel –
must not exceed 50 (122 ) if mounted through the face of a control panel, otherwise the life of electronic
components (especially electrolytic capacitors) may be shortened.
Note • Avoid setting this instrument directly on or near flammable material even though the case of
this instrument is made of flame-retardant resin.
2. Wiring precautions
Caution
•Do not leave wire remnants in the instrument, as they could cause a fire or malfunction.
•The terminal block of this instrument is designed to be wired from the upper side. The lead wire must be
inserted from the upper side of the terminal, and fastened with the terminal screw.
•Tighten the terminal screw using the specified torque. If excessive force is applied to the screw when
tightening, the terminal screw or case may be damaged.
•Do not pull or bend the lead wire on the terminal side when wiring or after wiring, as it could cause
malfunction.
•Use a thermocouple and compensating lead wire according to the sensor input specifications of this
instrument.
•Use the 3-wire RTD according to the sensor input specifications of this instrument.
•This instrument does not have a built-in power switch, circuit breaker and fuse. It is necessary to install a
power switch, circuit breaker and fuse near the instrument. (Recommended fuse: Time-lag fuse, rated
voltage 250 V AC, rated current 2 A)
•For a 24 V AC/DC power source, do not confuse polarity when using direct current (DC).
•When using a relay contact output type, externally use a relay according to the capacity of the load to
protect the built-in relay contact.
•When wiring, keep input wires (thermocouple, RTD, etc.) away from AC power sources or load wires.
•Do not apply a commercial power source to the sensor which is connected to the input terminal nor allow
the power source to come into contact with the sensor.

4
3. Operation and maintenance precautions
Caution
•Do not touch live terminals. This may cause electrical shock or problems in operation.
•Turn the power supply to the instrument OFF before retightening the terminal or cleaning.
•Working on or touching the terminal with the power switched ON may result in severe injury or death due
to electrical shock.
•Use a soft, dry cloth when cleaning the instrument. (Alcohol based substances may tarnish or deface the
unit.)
•As the display section is vulnerable, be careful not to put pressure on, scratch or strike it with a hard object.
Further information:
Internet address: www.wika.de / www.wika.com
Relevant data sheet: AC 80.02
Application consultant: Tel.: [phone]
Fax: [phone]
[email protected]

5
Contents
1. Model.................................................................................................................................................. 6
1.1 Model ........................................................................................................................................... 6
1.2 Product label................................................................................................................................ 6
2. Display and controls ........................................................................................................................ 7
3. Control panel mounting ................................................................................................................... 8
3.1External dimensions in mm ........................................................................................................ 8
3.2Panel cutout in mm...................................................................................................................... 8
3.3 Mounting the unit ........................................................................................................................ 8
4. Wiring ................................................................................................................................................. 9
4.1 Terminal arrangement ................................................................................................................. 9
4.2 Lead wire solderless terminal...................................................................................................... 9
4.3 Using as a current loop supply...................................................................................................... 10
5. Setup .................................................................................................................................................. 10
5.1 Registering the selected item or value........................................................................................ 11
5.2 Alarm setting mode...................................................................................................................... 11
5.3 Auxiliary function setting mode 1 ................................................................................................ 11
5.4 Auxiliary function setting mode 2 ................................................................................................ 13
5.5 Maintenance mode...................................................................................................................... 18
6. Operation........................................................................................................................................... 19
6.1 Operation..................................................................................................................................... 19
6.2 Switching SV display indication.................................................................................................. 19
6.3 How to use the alarm output ....................................................................................................... 19
6.4 How to use the event input function ............................................................................................ 19
7. Alarm Action...................................................................................................................................... 20
7.1 High limit alarm, low limit alarm................................................................................................... 20
7.2 High/Low limit range alarm action............................................................................................... 21
8. Specifications.................................................................................................................................... 22
9. Troubleshooting................................................................................................................................ 24
10. Key operation flowchart................................................................................................................... 26
11. Dismounting, return and disposal.................................................................................................... 27

6
1. Model
1.1 Model
DI25 - M □, □□□□□
Series name: DI25 (W 96 x H 48 x D 100 mm)
Input
M
Multi-function input (*1)
Power supply
H
100 … 240 V AC
L
24 V AC/DC
Output options
3AS
3 alarm outputs for process value monitoring (*2)
P24
Transmitter supply output (DC 24 V max. 30 mA) (*3)
KB
Terminal cover, color black
(*1) Thermocouple (10 types), RTD (2 types), direct current (2 types) and DC voltage (4 types) can be selected
by keypad.
(*2) Alarms A1, A2 and A3 outputs are standard features. Alarm types (4 types for A1, A2, and 5 types for A3 as
well as no alarm action) and energized/de-energized can be selected.
(*3) If transmitter supply output (P24 option) is ordered, A2 output cannot be used.
1.2 Product label
Model labels are attached to the case and the inner assembly.
Top of the case
(Fig. 1.2-1)
No.
Description
Example
①
Model
DI25
②
Order code
DI25-M-H3ASKB
③
Signal input
Multi-function
④
Power supply
24 V
⑤
S# serial no.
201841915
⑥
P# product no.
XXXXXXXX
⑦
Date of manufacture
2018-02
①
②
③
④
⑤
⑥
⑦

7
2. Display and Controls
(Fig. 2-1)
Display, indicator
Name
Description
PV display
Indicates PV (process variable) or characters in the setting mode with the red LED.
SV display
Indicates A1/A2/A3 value or the set value in the setting mode with the green LED.
HOLD indicator
When PV is held (HOLD, Peak HOLD, Bottom HOLD), the yellow LED is lit.
A1 value indicator
When A1 value is indicated on the SV display, the green LED is lit.
A2 value indicator
When A2 value is indicated on the SV display, the green LED is lit.
A3 value indicator
When A3 value is indicated on the SV display, the green LED is lit.
A1 action indicator
When A1 output is ON, the red LED is lit.
While A1 output is held, the red LED flashes (maintenance mode).
A2 action indicator
When A2 output is ON, the red LED is lit.
While A2 output is held, the red LED flashes (maintenance mode).
A3 action indicator
When A3 output is ON, the red LED is lit.
While A3 output is held, the red LED flashes (maintenance mode).
Key
Name
Description
UP key
Increases the numeric value.
FAST key
Makes the set value change faster while pressing the UP/DOWN key and FAST key
together.
DOWN key
Decreases the numeric value.
MODE key
Selects the setting mode, and registers the set value.
Notice
When setting the specifications and functions of this instrument, connect mains power cable to terminals 2 and 3
first, then set them referring to “5. Setup” before performing “3. Mounting to the control panel” and “4. Wiring”.
FAST key
UP key
MODE key
DOWN key
SV display
PV display
A1 to A4
value indicator
HOLD indicator
TX/RX indicator
A1 to A4 action indicator

8
3. Control panel mounting
3.1 External dimensions in mm
(Fig. 3.2-1)
3.2 Panel cutout in mm
Vertical close mounting
n: Number of mounted units
Caution: If vertical close mounting is used
for the instrument, IP66 may be compromised,
and all warranties will be invalidated.
(Fig. 3.3-1)
3.3 Mounting the unit
Mount the instrument vertically to the flat, rigid panel to ensure it adheres to the ingress protection (IP66).
Mountable panel thickness: 1 to 8 mm
(1) Insert the instrument from the front side of the control panel.
(2) Attach the mounting brackets by the slots on the right and left sides of the case, and secure the instrument in place
with the screws.
(Fig. 3.4-1)
Caution
As the case of the DI25 is made of resin, do not use excessive force while tightening screws, or the mounting
brackets or case could be damaged. 0.12 Nm of torque is recommended.
130
92
＋0.8
0
n×48-3＋0.5
0
92
＋0.8
0
45＋0.5
0
Gasket
Terminal cover
48
44.5
2(*)
11.5
98.5
104.5(*)
96
106.2
(*) When terminal cover is used

9
4. Wiring
Warning
Turn the power supply to the instrument off before wiring or checking. Working on or touching the terminal with
the power switched on may result in severe injury or death due to electrical shock.
4.1 Terminal arrangement
(Fig. 4.1-1)
4.2 Lead wire solderless terminal
Use a solderless terminal with an insulation sleeve in which an M3 screw fits as shown below.
0.63 Nm of torque is recommended.
Terminal name
Description
GND
Ground terminal
PWR
Power supply
TRANSMIT OUTPUT1
Transmission output 1
A1
A1 output
A2
A2 output
A3
A3 output
EVENT INPUT
Event input
TC
Thermocouple input
RTD
RTD input
DC
Direct current input, DC voltage input
For direct current input (externally mounted 50 shunt resistor),
connect a 50 shunt resistor (sold separately) between input
terminals.
P24
Insulated power output 24 V (P24 option)
5.8 mm max
3.2 mm
φ3.2 mm
5.8 mm max
(Fig. 4.2-1)

10
4.3 Using as a crrent loop supply
Refer to the following wiring example.
5. Setup
After power is turned ON, the input characters and temperature unit will be indicated on the PV display, and the
input range high limit (for thermocouple, RTD input) or scaling high limit (for direct current, DC voltage input)
will be indicated on the SV display for approx. 3 sec. (Table 5-1).
During this time, all outputs and LED indicators are in an OFF status. Operation will then start, indicating the
PV (process variable) on the PV display, and A1, A2, A3 value on the SV display.
(Table 5-1)
Sensor input
PV display ( )
SV display
PV display ( )
SV display
K
J
R
S
B
E
T
N
PL-
C (W/Re5-26)
Pt100
JPt100
Pt100
JPt100
4-20 mA DC (*1)(*2)
0-20 mA DC (*1)(*2)
0-1 V DC (*1)
0-5 V DC (*1)
1-5 V DC (*1)
0-10 V DC (*1)
4-20 mA DC (*1)(*3)
0-20 mA DC (*1)(*3)
Scaling high
limit value
(*1) Input range and decimal point place can be selected.
(*2) Connect a 50 shunt resistor (sold separately) between input terminals.
(*3) Has a built-in 50 shunt resistor.
(Fig. 4.3-1)
24 V
power circuit
20
19
18
+ -
2-wire transmitter
+
-
+
50
250

11
5.1 Registering the selected item or value
•To increase or decrease the numeric value, use the UP or DOWN key.
oTo make the set value change faster, press and hold the UP/DOWN key and FAST key together.
oSelect an setting item with the UP or DOWN key.
•Register the setting item or value using the MODE key.
5.2 Alarm setting mode
If the MODE key is pressed in PV/SV display mode, the unit will move to alarm setting mode.
Character factory default
Setting item, function, setting range
A1 value
•Sets A1 output action point, refer to (table 5.2-1).
•Not available if no alarm action is selected in [A1 type]
A2 value
•Sets A2 output action point, refer to (table 5.2-1).
•Not available if no alarm action is selected in [A2 type]
•Not available if insulated power output (P24 option) is ordered.
A3 value
•Sets A3 output action point, refer to (table 5.2-1).
•Not available if no alarm action or High/Low limit range alarm is
selected in [A3 type]
(Table 5.2-1)
Alarm type
Setting range
High limit alarm
Input range low limit to input range high limit (*1)
Low limit alarm
Input range low limit to input range high limit (*1)
High limit with standby alarm
Input range low limit to input range high limit (*1)
Low limit with standby alarm
Input range low limit to input range high limit (*1)
•The placement of the decimal point follows the selection or input range.
(*1) For DC current and DC voltage input: setting range is [scaling low limit to scaling high limit].
5.3 Auxiliary function setting mode 1
To enter auxiliary function setting mode 1, press and hold the DOWN key and MODE key (in that order) together for
approx. 3 seconds in PV/SV display mode.
Character factory default
Setting item, function, setting range
Set value lock
•Locks the set values to prevent setting errors.
•The setting item to be locked depends on the selection.
• (Unlock): All set values can be changed.
(Lock 1): None of the set values can be changed.
(Lock 2): Only alarm setting mode (p.11) can be changed.
(Lock 3): All set values – except the input type (p.14) – can be
changed.
However, changed values revert to their previous value after power is turned
off because they are not saved in the non-volatile IC memory. Do not change
any setting items in auxiliary function setting mode 2 (pp.11 - 18). If any item
is changed in auxiliary function setting mode 2, it will affect the alarm value
(A1 value – A3 value).
Sensor correction coefficient
•Sets sensor correction coefficient = slope of input value from a sensor.
•PV after sensor correction= Current PV x (sensor correction coefficient)
+ (sensor correction value)
Refer to input value correction’ (p. 12), Setting range: -10.000 to 10.000

12
Character factory default
Setting item, function, setting range
Sensor correction
•This corrects the input value from the sensor.
When a sensor cannot be set at the exact location where measurement
is desired, the sensor-measured temperature may deviate from the
temperature in the measurement location. When using multiple
indicators, sometimes the measured temperatures do not match due to
differences in sensor accuracy or installation site.
In such a case, the temperature in the installation site can be adjusted to
the desired temperature by adjusting the sensor input value.
PV after sensor correction= Current PV x (sensor correction coefficient)
+(sensor correction value)
Refer to ‘input value correction’ (p.12).
•Setting range: -1000.0 to 1000.0 ( )
Direct current, DC voltage input: -10000 to 10000 (The placement of the
decimal point follows the selection.)
Input value correction
Input value can be corrected in [sensor correction coefficient] and [sensor correction].
In [sensor correction coefficient], set the slope of temperature change.
In [sensor correction], set the difference between temperatures before correction and after correction.
PV after input correction is expressed by the following formula.
PV after input correction = current PV x sensor correction coefficient + (sensor correction value)
The following shows an example of input value correction using ‘sensor correction coefficient’ and ‘sensor
correction value’.
(1) Select any 2 points of PV to be corrected, and determine the PV after correction.
PV before correction: 300 PV after correction: 340
PV before correction: 750 PV after correction: 700
(2) Calculate sensor correction coefficient from step (1).
(Y' – X') / (Y – X) = (700 – 340) / (750 - 300) = 0.8
(3) Enter a PV value of 300 using an mV generator or dial resistor.
(4) Set step (2) value as a sensor correction coefficient.
(5) Read the PV. 240 will be indicated.
(6) Calculate the sensor correction value. Calculate the difference between ‘PV after correction’ and Step (5)
PV.
340 – 240 = 100
300
300
340
750
750
700
After correction
Before correction
Slope before correction
Slope after correction
Y
Y’
X’
X
Corrected from 750 to 700 .
Corrected from 300
to 340 .
(Fig. 5.3-1)

13
(7) Set step (6) value as a sensor correction value.
(8) Enter an electromotive force or resistance value equivalent to 750 using an mV generator or dial resistor.
(9) Read the PV, and confirm that 700 is indicated.
5.4 Auxiliary function setting mode 2
To enter auxiliary function setting mode 2, press and hold the UP, DOWN and MODE keys (in that order)
together for approx. 3 seconds in PV/SV display mode.
Character factory default
Setting item, function, setting range
Input type
•The input type can be selected from thermocouple (10 types), RTD (2
types), DC current (2 types) and DC voltage (4 types), and the unit /
can be selected as well.
•When changing the input from DC voltage to other inputs, remove the
sensor connected to this instrument first, then change the input. If the
input is changed with the sensor connected, the input circuit may break.
(Table 5.4-1)
Character
Input range
Character
Input range
K -200 to 1370
K -320 to 2500
K -200.0 to 400.0
K -200.0 to 750.0
J -200 to 1000
J -320 to 1800
R 0 to 1760
R 0 to 3200
S 0 to 1760
S 0 to 3200
B 0 to 1820
B 0 to 3300
E -200 to 800
E -320 to 1500
T -200.0 to 400.0
T -200.0 to 750.0
N -200 to 1300
N -320 to 2300
PL- 0 to 1390
PL- 0 to 2500
C(W/Re5-26) 0 to
2315
C(W/Re5-26) 0 to 4200
Pt100 -200.0 to
850.0
Pt100 -200.0 to 1000.0
JPt100 -200.0 to
500.0
JPt100 -200.0 to 900.0
Pt100 -200 to 850
Pt100 -300 to 1500
JPt100 -200 to 500
JPt100 -300 to 900
4 to 20 mA DC -2000 to 10000
(Externally mounted 50 shunt resistor)
0 to 20 mA DC -2000 to 10000
(Externally mounted 50 shunt resistor)
0 to 1 V DC -2000 to 10000
0 to 5 V DC -2000 to 10000
1 to 5 V DC -2000 to 10000
0 to 10 V DC -2000 to 10000
4 to 20 mA DC -2000 to 10000 (Built-in 50 shunt
resistor)
0 to 20 mA DC -2000 to 10000 (Built-in 50 shunt
resistor)

14
Character factory default
Setting item, function, setting range
Scaling high limit
•Sets scaling high limit value.
•Available when DC current or DC voltage input is selected in [Input type].
•Setting range: Scaling low limit to Input range high limit (the placement
of the decimal point follows the selection or input range.)
Scaling low limit
•Sets scaling low limit value.
•Available when DC current or DC voltage input is selected in [Input type].
•Setting range: Input range low limit to scaling high limit (the placement of
the decimal point follows the selection or input range.)
Decimal point place
•Selects decimal point place.
•Available when direct current or DC voltage input is selected in [Input
type]. : No decimal point
: 1 digit after decimal point
: 2 digits after decimal point
: 3 digits after decimal point
PV filter time constant
•Sets PV filter time constant. If the value is set too large, it affects alarm
action due to the delay of response.
•Setting range: 0.0 to 10.0 sec
A1 type
•Selects an A1 type. See section 7.1 (p.20).
•If A1 type is changed, A1 value will default to 0 (0.0).
• : No alarm action
: High limit alarm
: Low limit alarm
: High limit with standby alarm
: Low limit with standby alarm
A2 type
•Selects an A2 type. See section 7.1 (p.20).
•Not available when insulated power output (P24 option) is ordered.
•If A2 type is changed, A2 value will default to 0 (0.0).
• : No alarm action
: High limit alarm
: Low limit alarm
: High limit with standby alarm
: Low limit with standby alarm
A3 type
•Selects an A3 type. See section 7.1 (p.20).
•If A3 type is changed, A3 value will default to 0 (0.0).
• : No alarm action
: High limit alarm
: Low limit alarm
: High limit with standby alarm
: Low limit with standby alarm
: High/Low limit range alarm [See Section 7.2 (p.21).]

15
Character factory default
Setting item, function, setting range
A1 Energized/De-energized
•Selects A1 Energized/De-energized.
Not available if no alarm action is selected in [A1 type].
•When [A1 Energized] is selected, A1 output (terminals 7, 8) is conducted
(ON) while A1 action indicator is lit.
A1 output is not conducted (OFF) while A1 action indicator is unlit.
When [A1 De-energized] is selected, A1 output (terminals 7, 8) is not
conducted (OFF) while A1 action indicator is lit.
A1 output is conducted (ON) while A1 action indicator is unlit.
A1 output will be substituted by A2, A3 or A4 output.
A1 output terminals will be substituted by A2, A3 or A4 output terminals as
follows.
A2 output terminals: 9, 10
A3 output terminals: 12, 13
A4 output terminals: 15, 16
High limit alarm (Energized) High limit alarm (De-energized)
(Fig. 5.4-1) (Fig. 5.4-2)
: Energized
: De-energized
A2 Energized/De-energized
•Selects A2 Energized/De-energized.
Not available if no alarm action is selected in [A2 type].
•Not available if insulated power output (P24 option) is ordered.
•: Energized
: De-energized
A3 Energized/De-energized
•Selects A3 Energized/De-energized.
Not available if no alarm action or high/low limit range alarm is selected in
[A3 type].
•: Energized
: De-energized
A1 hysteresis
•Sets A1 hysteresis.
•Not available if no alarm action is selected in [A1 type].
•Setting range: 0.1 to 100.0 ( )
DC current, DC voltage input: 1 to 1000 (the placement of the decimal
point follows the selection.)
A2 hysteresis
•Sets A2 hysteresis.
•Not available if no alarm action is selected in [A2 type].
Not available if insulated power output (P24 option) is ordered.
•Setting range: 0.1 to 100.0 ( )
DC current, DC voltage input: 1 to 1000 (the placement of the decimal
point follows the selection.)
OFF
ON
A1 value
A1 hysteresis
OFF
ON
A1 value
A1 hysteresis

16
Character factory default
Setting item, function, setting range
A3 hysteresis
•Sets A3 hysteresis.
•Not available if no alarm action or high/low limit range alarm is selected in
[A3 type].
•Setting range: 0.1 to 100.0 ( )
DC current, DC voltage input: 1 to 1000 (the placement of the decimal
point follows the selection.)
A1 delay time
•Sets A1 action delay time.
When setting time has elapsed after the input enters the alarm output
range, the alarm is activated. Not available if No alarm action is selected
in [A1 type].
•Setting range: 0 to 9999 seconds
A2 delay time
•Sets A2 action delay time.
When setting time has elapsed after the input enters the alarm output
range, the alarm is activated.
•Not available if no alarm action is selected in [A2 type].
Not available if the insulated power output (P24 option) is ordered.
•Setting range: 0 to 9999 seconds
A3 delay time
•Sets A3 action delay time.
When setting time has elapsed after the input enters the alarm output
range, the alarm is activated.
•Not available if no alarm action or high/low limit range alarm is selected in
[A3 type].
•Setting range: 0 to 9999 seconds
Transmission output 1 high limit
•Sets the transmission output 1 high limit value.
Standard
4-20 mA DC
Equals 20 mA DC output.
Optional
0-20 mA DC
Equals 20 mA DC output.
0-1 V DC
Equals 1 V DC output.
0-5 V DC, 1-5V DC
Equals 5 V DC output.
0-10 V DC
Equals 10 V DC output.
•Setting range: transmission output 1 low limit to Input range high limit (the
placement of the decimal point follows the selection or input range.)
Transmission output 1 low limit
•Sets the transmission output 1 low limit value.
Standard
4-20 mA DC
Equals 4 mA DC output.
Optional
0-20 mA DC
Equals 0 mA DC output.
0-1 V DC, 0-5 V DC,
0-10 V DC
Equals 0 V DC output.
1-5 V DC
Equals 1 V DC output.
•Setting range: input range low limit to transmission output 1 high limit (the
placement of the decimal point follows the selection or input range.)

17
Character factory default
Setting item, function, setting range
Event input function
•Selects event input function.
• (HOLD):
PV at the given time is held and indicated by closing event input terminals
(14, 17). The HOLD function is cancelled by opening the event input
terminals (14, 17).
(Peak HOLD):
The updated maximum PV is indicated by closing event input terminals
(14, 17). The Peak HOLD function is cancelled by opening the event input
terminals (14, 17).
(Bottom HOLD):
The updated minimum PV is indicated by closing event input terminals
(14, 17). The Bottom HOLD function is cancelled by opening event input
terminals (14, 17).
(Alarm HOLD 1):
If any of [A1 HOLD function] to [A3 HOLD function] is set to “Enabled”,
and if the alarm is ON, the alarm will be maintained by closing event input
terminals (14, 17).
The Alarm HOLD function will be cancelled by opening event input
terminals (14, 17). While the Event input terminals (14, 17) are open, the
Alarm HOLD function will be disabled.
(Alarm HOLD 2):
If any of [A1 HOLD function] to [A3 HOLD function] is set to “Enabled”,
and if the alarm is ON, the alarm will be maintained by opening the event
input terminals (14, 17).
The Alarm HOLD function will be cancelled by closing event input
terminals (14, 17). While the event input terminals (14, 17) are closed, the
Alarm HOLD function will be disabled.
A1 HOLD function
•Enables/Disables the A1 HOLD function.
Not available if no alarm action is selected in [A1 type].
•If A1 HOLD function is set to “Enabled”, and if the alarm is ON, the alarm
output ON status will be maintained until the following is conducted.
•The FAST key is pressed for approx. 3 seconds and power is turned OFF.
•The HOLD is cancelled by the event input function.
During A1 HOLD, the A1 action indicator flashes.
•: Disabled
: Enabled
A2 HOLD function
•Enables/Disables the A2 HOLD function.
Not available if no alarm action is selected in [A2 type].
Not available if insulated power output (P24 option) is ordered.
•If A2 HOLD function is set to “Enabled”, and if the alarm is ON, the alarm
output ON status will be maintained until the following is conducted.
•The FAST key is pressed for approx. 3 seconds and power is turned OFF.
•The HOLD is cancelled by the event input function.
During A2 HOLD, the A2 action indicator flashes.
•: Disabled
: Enabled
A3 HOLD function
•Enables/Disables the A3 HOLD function.
Not available if no alarm action or high/low limit range alarm is selected
in [A3 type].
•If A3 HOLD function is set to “Enabled”, and if the alarm is ON, the alarm
output ON status will be maintained until the following is conducted.

18
Character factory default
Setting item, function, setting range
•The FAST key is pressed for approx. 3 seconds.
•The power is turned OFF.
•The HOLD is cancelled by the event input function.
During A3 HOLD, the A3 action indicator flashes.
: Disabled
: Enabled
Square root function
•Enables/Disables the square root extraction function.
•Indication value or square root extraction value is expressed by the
formula below.
PVVP 

PV': Indication value, square root extraction value
PV: Process variable
•: Disabled
: Enabled
Low level cutoff
•Sets the low level cutoff value.
•When PV input is near 0
(zero), the result of square root
extraction changes
considerably with only a very
small change of input. In this
case, the PV is forced to
become 0 (zero). If PV input is
lower than the low level cutoff
value, the PV will become 0.
•Setting range: 0.0 to 25.0% of
input range
(Fig. 5.4-3)
5.5 Maintenance mode
To enter maintenance mode, press the UP and FAST keys (in that order) together for approx. 5 seconds in
PV/SV display mode. If the unit enters maintenance mode, all outputs are forced to turn OFF.
Character factory default
Setting item, function, setting range
A1 output ON/OFF
•A1 output can be turned ON by the UP key, and OFF by the DOWN key.
Not available if no alarm action is selected in [A1 type].
•: Output OFF
: Output ON
A2 output ON/OFF
•A2 output can be turned ON by the UP key, and OFF by the DOWN key.
Not available if no alarm action is selected in [A2 type].
Not available if insulated power output (P24 option) is ordered.
•: Output OFF
: Output ON
A3 output ON/OFF
•A3 output can be turned ON by the UP key, and OFF by the DOWN key.
Not available if No alarm action or High/Low limit range alarm is selected
in [A3 type].
•: Output OFF
: Output ON
Transmission output 1 manual output
•Sets output amount of transmission output 1.
•Setting range: 0.0 to 100.0%
20
1.0% of input range (4.16 mA)
(e.g.) Input: 4-20 mA DC, Scaling range: 0-100
Low level cutoff: 1.0%
In this case, PV becomes 0 if it is lower than 1.0%.
Input (mA)
100
0
4
10
Indication
value

19
6. Operation
6.1 Operation
After the DI25 is mounted to the control panel and wiring is completed, operate the unit following the procedure
below.
(1) Turn the power supply to the DI25 ON. For approximate 3 sec after the power is switched ON, the input
characters and the temperature unit are indicated on the PV Display, and input range high limit
(thermocouple, RTD input) or scaling high limit (direct current, DC voltage input) is indicated on the SV display.
See (Table 5-1) (p.10).
During this time, all outputs and LED indicators are in an OFF status. After that, indication starts, indicating
PV on the PV display, and A1, A2 or A3 value on the SV display.
(2) Enter each set value, referring to section “5. Setup”.
6.2 Switching SV display indication
To change indication on the SV display, press the UP and MODE keys (in that order) together in the PV/SV
display mode. The next alarm value (of the currently indicated A1-A3 value) will be displayed.
If the UP and MODE keys (in that order) are pressed together at [A3 value indication], the unit reverts to [A1
value indication].
Indication
Setting item, function
PV
A1 value
A1 value indication
Indicates A1 value on the SV display, and the A1 value indicator is lit. Not available if no alarm
action is selected in [A1 type].
PV
A2 value
A2 value indication
Indicates A2 value on the SV display, and the A2 value indicator is lit.
Not available if no alarm action is selected in [A2 type].
Not available if insulated power output (P24 option) is ordered.
PV
A3 value
A3 value indication
Indicates A3 value on the SV display, and the A3 value indicator is lit.
Not available if no alarm action or high/low limit range alarm is selected in [A3 type].
6.3 How to use the alarm output
(e.g.) To use A1 output, follow the procedure below.
1. Select an A1 type in [A1 type] (p.14) in auxiliary function setting mode 2.
2. Set the following items in auxiliary function setting mode 2 if required:
A1 Energized/De-energized (p.15), A1 hysteresis (p.15), A1 delay time (p.16), A1 HOLD function (p.17)
3. Set the A1 value in [A1 value (p.14)] in alarm setting mode.
A1 output settings are complete. The same applies to A2 and A3 output.
6.4 How to use the event input function
(e.g.) To use Peak HOLD of the event input function, follow the procedure below.
1. Select Peak HOLD in [event input function (p.17)] in auxiliary function setting mode 2.
2. The updated maximum PV is indicated by closing event input terminals (14, 17).
The Peak HOLD function is cancelled by opening event input terminals (14, 17).

20
7. Alarm action
7.1 High limit alarm, low limit alarm
•The following terminal numbers are used for respective alarm outputs.
A2 output terminals: 9, 10
A3 output terminals: 12, 13
A4 output terminals: 15, 16
•A1, A2, A3 action indicator is lit when each output terminals are ON.
A1, A2, A3 action indicator is turned off when its output terminals are OFF.
: A1 output terminals (7, 8) ON
: A1 output terminals (7, 8) ON or OFF
: A1 output terminals (7, 8) OFF
: A1 output is in standby.
A
1
hysteresis
A
1
value
OFF
ON
OFF
ON
OFF
ON
OFF
ON
A
1
hysteresis
A
1
hysteresis
A
1
hysteresis
A
1
value
A
1
value
A
1
value
High limit alarm
Low limit alarm
High limit with standby alarm
Low limit with standby alarm
A
1
output
A
1
action
A
1
output
A
1
action